Pateick kelly



(No Model.)

P. KELLY.

SUPPORT FOR ROCK DRILLS. No. 388,203. Patented Aug. 21, 1888.

WITNESSES:

ATTORNEY,

n PETERS. m mmn Wunm'ion. o. c.

UNITED STATES PATRICK KELLY, OF POUGIIKEEPSIE,

ASSIGNOR TO ADDISON (l. RAXD, OF

NEV "ORK, N. Y.

SUPPORT FOR ROCK-DRILLS.

SPECIFICATION forming part of Letters Patent No. 388,203, dated August21, 1888.

A pplieation filed May 13,1887.

To all whom it may concern:

Be it known that I, PATRICK KELLY, a resident of Ioughkeepsie, county ofDutchess, State of New York, have invented certain new and usefulImprovements in Supports for Rock-Drills, of which the following is aspecification.

My invention relates to various details of construction, which will behereinafter fully described.

In the accompanying drawings, which illustrate my improved apparatus,similar letters of reference indicate like parts.

Figure l. is a longitudinal elevation of a tunnel-bar such as I desireto use, and upon which is mounted a bent radial arm made in accordancewith my invention. Fig. 2 is a longitudinal elevation, partially insection, of a modification of the tunnel-bar, showing two of the radialarms mounted thereon and in different positions, and likewise showing adrill-carriage on the end of one arm. Fig. 3 is an elevation of thelever and weight employed for adjusting and maintaining the position ofthe tunnel-bar. Fig. 4 is a top view and partial section on the line Xof Fig. 2 of the hub or bearing upon the tunnel-bar, and which serves tosupport and adjust a radial arm. Fig. 5 is a vertical section of the hubon the line Z Z of Fig. 2.

In the drawings, A is a tunnel-bar such as I desire to use, and isprovided on the ends with the serrated feet I. At one end of the bar isa jack-screw, (J, by means of which the bar can be extended.

A indicates a modification of the tunnelbar, which is shown as dividedin the center. It may be divided at any other convenient portion of itslength. The central and inner ends of the bar are provided with thetapped holes I) I), to receive the screws E I l of the double jack-screw F. The threads on the screws I l F. are cut in oppositedirections; and hence when the body of the jack-screw is rotated in onedirection the effect is to lengthen the tunnel-bar, and vice versa. Inorder to rotatethe jack-screw, the holes G G are provided in the bodyportion of the screw, in which the end of the lever II can be inserted.I is 50 a weight adjustable on the lever II. To adjust (No model.)

the bar the jackscrew is rotated and the bar extended as far as thewidth of the tunnel will allow. The lever is then placed in one of theholes of the body of the jack-screw on the side toward which the body isrotated, and which is in the horizontal plane of the bar. The weight isthen placed on the end of the lever, and falling by its gravity willrotate the body of the screw and thereby extend the bar to compensatefor any compressibility or shift- ()0 ing of the wooden blocks J, thisoften being necessary by reason of the vibration of the drill inworking.

K is one of the radial arms, of which there may be several, and ismounted on the tunnelbar by means of the split hub or bearings M. Oneend of the radial arm L is shown bent at a right angle to the axis ofthe bar. I may vary the angle to meet various conditions.

M is a three-part split hub bored horizon- 7O tally at N, Fig. 5, andthereby adjustable longitudinally on or rotatively around thetunnel-bar, and also bored vertically to receive the radial arm, wherebythe arm is adjustable vertically and circum ferentially relative to the7 tunnel-bar. Such hubs are made in several parts and are provided withadj listing-bolts P.

On the horizontal end of the arm K, I I0- cate a clamping-seat, It, madein all respects similar to that described in United St ates Let- 8o tersPatent No. 264,524, dated September 19, 1882, and granted to Joseph (I.Ilitheus; or I may use any other clam 'ling-seat for the drillcarriage.

By locating the drill-seat upon the horizon s tal bend of the arm a firmseat is secured. The drill may be moved eireumferentially on its seat,and when the clamping-nuts of the seat and hub are loosened the arm andits bearing can be swung around and downward into the 0 positionoccupied by the arm at the left of Fig. 2, and without removing thedrill from its carriage. These motions and adjustment are in practicefound to be of great practical advantage.

I. have hereinbefore stated that the tunnelbar may be arrangedhorizontally across the tunnel.

I do not wish to limit myself to the horizontal arrangement of the bar,as it may frequently IOO become necessary, in order to obtain properbearing for the ends of the bar, or for other reasons, to place the barat an angle across the tunnel. Neither do I wish to limit myself to theemployment of a bent radial arm for supporting a drill, although Iprefer to use such an arm as being better and more convenient.

I claim as my im'ention 1. An extensible tunnel-bar divided into twoparts, in combination with a double right and left hand jaekscrew and alever and adjustable Weight thereon for adjusting said bar andpreserving said adjustment, substantially as described.

2. The combination, with an extensible tun nel-bar, of a drillsupporting arm bent at its upper end to an angle with the axis of saidarm, substantially as described.

3. The combination, with an extensible tunnel-bar, of a dri1l-supportingarm bent at its upper end to an angle with the axis of said arm, and atlireepart hub bored horizontally and vertically and adapted to supportsaid arm upon the tunnel-bar, substantially as described.

4. The combination, with a rock-drill, of an extensible tunnel-bar, abent drill-supporting arm, and a hub or supporting-beamng for said arm,substantially as described.

PA TR 1 CK KELLY.

\Vi t nesses;

Gno. H. BENJAUTN, V. M. BRASUIII.

